Table 2.

Unadjusted and Adjusted Linear Model Results for Mean Daily CPAP Use (h)

Independent Variable	Unadjusted				Adjusted
	Estimate	SE	95% CI	p Value	Estimate	SE	95% CI	p Value
Age	0.02	0.03	(−0.03, 0.07)	.44	−0.03	0.03	(−0.08, 0.02)	.28
Sex				.77				.39
Female	0.11	0.38	(−0.64, 0.87)		0.33	0.38	(−0.43, 1.09)
Male	REF	REF	REF		REF	REF	REF
Race				<.001				<.001
White	1.71	0.45	(0.83, 2.60)	<.001	2.01	0.50	(1.02, 2.99)	<.001
Other	0.88	0.80	(−0.70, 2.46)	.27	1.39	0.92	(−0.43, 3.20)	.13
Black	REF	REF	REF		REF	REF	REF
Ethnicity				.99				.85
Hispanic	−0.01	0.72	(−1.44, 1.42)		0.16	0.87	(−1.56, 1.88)
Non-Hispanic	REF	REF	REF		REF	REF	REF
Education				.39				.87
> High School	0.41	0.47	(−0.52, 1.33)		0.08	0.47	(−0.85, 1.00)
≤ High School	REF	REF	REF		REF	REF	REF
Apnea–hypopnea Index	−0.01	0.01	(−0.03, 0.01)	.31
Apnea–hypopnea Index				.003				.002
≥30	−1.12	0.37	(−1.85, −0.38)		−1.17	0.36	(−1.89, −0.46)
<30	REF	REF	REF		REF	REF	REF
Body mass index	−0.01	0.03	(−0.06, 0.04)	.67	0.02	0.03	(−0.03, 0.08)	.45
Nighttime sleep duration	0.00	0.00	(−0.00, 0.01)	.45	0.00	0.00	(−0.00, 0.01)	.39
Epworth sleepiness scale	−0.02	0.04	(−0.10, 0.05)	.53	0.01	0.04	(−0.07, 0.08)	.89
CAI fidelity	0.45	0.13	(0.19, 0.71)	<.001	0.38	0.13	(0.12, 0.64)	.004
CDR-SOB	−0.28	0.25	(−0.79, 0.22)	.27	−0.24	0.26	(−0.74, 0.27)	.36

Notes: CAI = CPAP adherence intervention; CDR-SOB = clinical dementia rating sum of boxes; CI = confidence interval; REF = reference; SE = standard error. For unadjusted model, N = 171 for CDR-SOB, N = 164 for nighttime sleep duration and N = 174 for all other variables; for adjusted model, N = 161.